There is a strange rendering problem in sequence diagrams in cases where an external message is incoming from left side (or outgoing to right side) in several encapsulated boxes. Here is an example.
loop
loop
Bob->Alice : hello
opt
[->Alice : external event
end opt
end loop
end loop
We should expect the 'opt' box is completely drawn inside the 'loop' boxes, but this is not the case.
Best regards
F. Deryck
